This website has some great resources for OOAD and UML topics. Checkout the trainings, links, Free books etc. Also good resource website for IBM exam 486 - OOAD UML Certification.

CramSession offers some of the best forums and study guides to be found on the net... their study guides are outstanding. They set the bar. Plus, they're available for Microsoft, Cisco, CompTIA, Novell, Lotus and other vendor exams...

Resource center for IBM DB2 Universal Database.Carries information on DB2 Education, Certification and Training,and also provides DB2 Information links,DB2 Tips and tricks,DB2 User Articles,DB2 Whitepapers and Events.